Unformatted text preview: a. Single-Loop Circulation – Class Actinopterygii, Class Sarcopterygii b. Double-Loop Cicrulation – Class Amphibia, Class Reptilia 2. In the class Atinopterygii the animals have gills with opercula. The opercula can open and close forcing water over the gills so that oxygen can diffuse into the circulatory system of the animal. 3. Since the frog has no lungs it draws air into its mouth by closing its windpipe and depressing the floor of its mouth to draw air in through the nostrils. Then the nostrils are closed, the floor elevated to push air into the lungs. 4. Heart Chambers a. Sockeye Salmon - 2 b. Black-footed Ferret - 4 c. Columbia Spotted Frog - 3...
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- Fall '10
- Biology, Single loop circulation, Matt Schmasow, Columbia Spotted Frog